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Free radical scavenging of the phenolic compound-modified particles. (a) Inhibition as a function of the concentration of γ-Fe2O3@Hep-CS-G (black squares), γ-Fe2O3@Hep-CS-H (red circles), and γ-Fe2O3@Hep-CS-P particles (blue triangles) according to the DPPH assay and (b) absorbance of DPPH solution with the γ-Fe2O3@Hep-CS-G colloid of different concentrations (0.08–0.50 mg/mL); DPPH: 2,2-diphenyl-1-picrylhydrazyl.
